Well the first mistake you made was going to Hart, 2nd you could have solved the whole pressure thing with a custom stock not a factory one. as for the vangaurd they are made by howa for weatherby and some of those will shoot better then any custom you could build. i love my Weatherby's i have an Accumark that will shoot 5 shots into 7/8" at 200yrds with my handloads as for the Barnes bullets i never had a barnes bullet shoot fore crap in my Weatherby's factory or handload.Many years ago I got caught up in the Weatherby zip & glitz Mark V rifles. The wood stocks would move (warp, swell or what-have-you) almost every year causing the pressure points to create major accuracy problems. I have sent the rifles back to Weatherby on more than one occasion. Weatherby did correct the pressure point problems but the accuracy would not hold from season to season.
Eventually, I brought the rifle to Wally Hart. I had him float the barrel and bed the action. Boy did that turn out to be a bad move. The rifle shot so poorly that I eventually sent it back to Weatherby again. They would not work with the hogged out stock and recommended a replacement. You can imagine what that cost. I had them install a new stock and sold the rifle at a significant loss.
Weatherbys that have thin barrels, pressure points and wood stocks will never find there way back into my rifle cabinet.
I might add that Hart scoped the bore and told me that it was loaded with tool marks.
Just my experience with Weatherby rifles.